High-performance Si microwire photovoltaics

Michael D. Kelzenberg, Daniel B. Turner-Evans, Morgan C. Putnam, Shannon W. Boettcher, Ryan M. Briggs, Jae Yeon Baek, Nathan S Lewis, Harry A. Atwater

Research output: Contribution to journalArticle

182 Citations (Scopus)

Abstract

Crystalline Si wires, grown by the vapor-liquid-solid (VLS) process, have emerged as promising candidate materials for low-cost, thin-film photovoltaics. Here, we demonstrate VLS-grown Si microwires that have suitable electrical properties for high-performance photovoltaic applications, including long minority-carrier diffusion lengths (Ln ≫ 30 m) and low surface recombination velocities (S ≪ 70 cm·s-1). Single-wire radial p-n junction solar cells were fabricated with amorphous silicon and silicon nitride surface coatings, achieving up to 9.0% apparent photovoltaic efficiency, and exhibiting up to ∼600 mV open-circuit voltage with over 80% fill factor. Projective single-wire measurements and optoelectronic simulations suggest that large-area Si wire-array solar cells have the potential to exceed 17% energy-conversion efficiency, offering a promising route toward cost-effective crystalline Si photovoltaics.

Original languageEnglish
Pages (from-to)866-871
Number of pages6
JournalEnergy and Environmental Science
Volume4
Issue number3
DOIs
Publication statusPublished - Mar 2011

Fingerprint

silicon
Wire
liquid
electrical property
cost
recombination
coating
fill
Solar cell arrays
Vapors
Crystalline materials
Liquids
Open circuit voltage
Amorphous silicon
Silicon nitride
Energy conversion
Optoelectronic devices
Conversion efficiency
simulation
Costs

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Kelzenberg, M. D., Turner-Evans, D. B., Putnam, M. C., Boettcher, S. W., Briggs, R. M., Baek, J. Y., ... Atwater, H. A. (2011). High-performance Si microwire photovoltaics. Energy and Environmental Science, 4(3), 866-871. https://doi.org/10.1039/c0ee00549e

High-performance Si microwire photovoltaics. / Kelzenberg, Michael D.; Turner-Evans, Daniel B.; Putnam, Morgan C.; Boettcher, Shannon W.; Briggs, Ryan M.; Baek, Jae Yeon; Lewis, Nathan S; Atwater, Harry A.

In: Energy and Environmental Science, Vol. 4, No. 3, 03.2011, p. 866-871.

Research output: Contribution to journalArticle

Kelzenberg, MD, Turner-Evans, DB, Putnam, MC, Boettcher, SW, Briggs, RM, Baek, JY, Lewis, NS & Atwater, HA 2011, 'High-performance Si microwire photovoltaics', Energy and Environmental Science, vol. 4, no. 3, pp. 866-871. https://doi.org/10.1039/c0ee00549e
Kelzenberg MD, Turner-Evans DB, Putnam MC, Boettcher SW, Briggs RM, Baek JY et al. High-performance Si microwire photovoltaics. Energy and Environmental Science. 2011 Mar;4(3):866-871. https://doi.org/10.1039/c0ee00549e
Kelzenberg, Michael D. ; Turner-Evans, Daniel B. ; Putnam, Morgan C. ; Boettcher, Shannon W. ; Briggs, Ryan M. ; Baek, Jae Yeon ; Lewis, Nathan S ; Atwater, Harry A. / High-performance Si microwire photovoltaics. In: Energy and Environmental Science. 2011 ; Vol. 4, No. 3. pp. 866-871.
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